Monthly Archives: October 2017

I would like to introduce “Jacobi”, a new program that can solve fairy proof games. The home page is at http://wismuth.com/jacobi/. The program is a web app that runs in your browser and requires no installation.

It can solve proof games that Popeye struggles with, which by itself is a good enough reason to add Jacobi to your toolbox. There are also new possibilities like allowing undefined pieces in the diagram of a proof game.

That said, it is still far from being a “Natch/Euclide for fairy chess”. Jacobi’s introductory problem is in 9.5 moves, while Natch’s is in 22.5 and Euclide’s in 26.0. But this is the first version and performance might improve over time.

How to try Jacobi for people in a hurry:– copy any example problem from the home page to your clipboard– click on “Launch the latest version”– paste the problem into the box below “Text representation”– click on “Set problem from text”– click on “Start”.

(28.10) No.1245.1-5 – Andreas Thoma (-N/#1; Proca Retractor; Anticirce Cheylan). A selection (PDF) of 5 Proca Retractors with Anticirce Cheylan condition with the same idea. For the competition I’ve assigned numbers to original problems from No.1245.1 to 1245.5.

(22.06) No.1244.1-15 – Andreas Thoma (-N/#1; Proca Retractor; Anticirce Cheylan). A selection (PDF) of 15 Proca Retractors with Anticirce Cheylan condition, each using not more than 4 pieces on the board was presented by Andreas and published on 22.06.2017. For the competition I’ve assigned numbers to original problems from No.1244.1 to 1244.15.

(28.10) No.1146.1 – Paul Rãican (PG 17; Masand). The version to No.1146, published after the end of tournament but before the award is made, accepted by the judge of PG/Retros 2015-16 Thomas Brand.

Animated diagrams use Py2Web by Dmitri Turevski and WinChloe’s graphics.

announce on the occasion of the 100th anniversary of the Czechoslovak Republic

International anonymous chess composing jubilee tournament

Czechoslovakia 100

Sections: a) Mate in 2 moves b) Helpmate in 2 moves c) Symbolic composition without any limitation of stipulation and conditions, which in any way evokes the 100th anniversary of the establishment of the Czechoslovak Republic → see PDF announcement